Hi
My Nokia E90 phone gets locked automatically (not the keypad lock) and this has been set as 15 minutes under the "Phone autolock period" settings which is available in "Security->Phone and SIM card" settings.
However i am not able to change this number anything other than 15 minutes or to None. When I try to change this value to say 20 min, it gets back to 15 minutes. If I try to change it to "None" it says "Unable to lock phone" .
What could be wrong.
Thanks a lot..
Aravind